objective c - How do I hide a button when an IBAction is performed? -

i attempting hide nsbutton performs miniaturize when different nsbutton on interface clicked. attempts far have been unsuccessful, have tried:

.h file:

@interface appdelegate : nsobject <nsapplicationdelegate> {     iboutlet nswindow *window;     iboutlet webview *webview;     iboutlet nsbutton *dominimize; }  @property (assign) iboutlet nswindow *window; @property (assign) iboutlet nsbutton *button; @property (nonatomic, retain) iboutlet webview *webview; 

.m file:

@implementation appdelegate  @synthesize window; @synthesize webview; @synthesize dominimize;  - (ibaction)togglefullscreen:(id)sender { ...  [dominimize setenabled:no]; [dominimize settransparent:yes];  ... } 

it appears no matter in action try disable , make button transparent, doesn't seem respond anything. have give button it's own class make work? if so, how able modify button ibaction inside of different class?

i apologize in advance if question silly, i'm relatively new world of objective-c , starting feet wet.

thanks in advance.

have tried -sethidden:?

[dominimize sethidden:yes];